Transmission Fluid Leak From Cooler Line on Chevrolet Lumina

The rubber section of an automatic transmission cooler line may develop a fluid leak . In some cases the leaking section of hose can be replaced. In others, the complete cooler line must be replaced to correct this concern.

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Average mileage: 133,279 (79,096–217,000)
10 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996, 1997, 1998, 1999
16 people reported this problem
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problem details
1999 Chevrolet Lumina 120,000 mi,
Transmission Fluid leaking from metal portion of Cooler line, on bend near radiator
trans lines leak near radiator
1996 Chevrolet Lumina 217,000 mi,
fixed line. no further issue
1991 Chevrolet Lumina 80,300 mi,
lines leaking.
Car smokes bad when driving want change gears
1997 Chevrolet Lumina 79,096 mi,
Transmission Cooler Lines Can Leak Fluid inside the radiator